Kentaro Hiyama's First Pregnancy was serialized in Kodansha's bimonthly (at the time) Be Love Magazine from August 2012 to November 2012 and was collected into a single tankōbon volume.
'The Pregnancy of Kentarō Hiyama Childcare') was serialized in Kodansha's monthly Be Love Magazine from August 2019 to September 2020 and has been collected into 2 tankōbon volumes.
[5] During their panel at New York Comic Con in 2023, Kodansha USA announced that they licensed the entire manga in digital-only formats under one title.
[6] A live-action drama series loosely based on the manga was co-produced by Netflix and TV Tokyo, with Takumi Saitoh portraying Kentaro Hiyama.
He begins to take notice of the prejudice towards pregnant women and starts developing symptoms that lead to him calling his mother and asking how she felt about raising him on her own after his father died.
After an encounter with a woman on a women-only passenger car, who quickly deduces his pregnancy and shows compassion by offering him to sit with them, he is further pushed to potentially keep the child.
[12]: 30_32 Kentaro attempts to correct her and realizes that he must change people's perspective about male pregnancy while also deciding to keep the baby.
Mizuki Kawabata, the woman on the train, is also pregnant, but is in a relationship with an unfaithful boyfriend who claims that he is breaking up with his other girlfriend to be with her.
She is also upset that he disregards the hard work she is doing and the job she is having while he sits around the house and openly voices her displeasure of pregnant men while also hiding her husband's condition from everyone.
Kentaro begins taking Kotaro to work where Aki dotes over him and he reunites with Mizuki who has also given birth and started a baby carriage business with a friend.
[18] Three years after Kotaro's birth, Kentaro and Aki are trying to balance their work and personal lives, but slowly begin to consider moving in with one another to make things easier.
Seiya seeks the aid of Kentaro after learning of his similar past and ask that he manage his public image, much to his confusion.
Kentaro later meets with Makoto Hatano, an employee who reveals that she has been seeing her direct supervisor Hiromi Shimomura, who is married, and that she may have gotten him pregnant.
A subplot revolves around Kentaro trying to maintain his daycare center which is slowly going out of business due to the number of male pregnancies decreasing.
Taking place sometime after Childcare Edition, Kentaro and Aki befriend an up and coming politician named Shimadzu Hajime who suddenly becomes pregnant.
A year after the election, it is revealed that Hajime lost, but is happily raising his child with his wife, while public opinion of male pregnancy has turned for the better.